File:The Old American Locks of 1885-1881 - The Soos of to-day, American and Canadian - the key to the Great Lakes, a nation's commerce passes by its doors.jpg
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![File:The Old American Locks of 1885-1881 - The Soos of to-day, American and Canadian - the key to the Great Lakes, a nation's commerce passes by its doors.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/The_Old_American_Locks_of_1885-1881_-_The_Soos_of_to-day%2C_American_and_Canadian_-_the_key_to_the_Great_Lakes%2C_a_nation%27s_commerce_passes_by_its_doors.jpg/732px-The_Old_American_Locks_of_1885-1881_-_The_Soos_of_to-day%2C_American_and_Canadian_-_the_key_to_the_Great_Lakes%2C_a_nation%27s_commerce_passes_by_its_doors.jpg?20220121032400)
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